Dan Piponi wrote:
Several months late I now have a simple test case for what I think is either a GHC bug or a "misexpectation" on my part.
Here's what it looks like to me. If there is a .hi and .o file sitting around for a module, then GHCi will load it in compiled mode, and only let you access those symbols that are exported by the .hi file. If you compile a source file that has no module header, it compiles to the module Main and *only* exports the symbol main. You can fix it by adding a module header explicitly, or by deleting either the .hi or .o file. This is not new with GHC 6.8. For example, it's why I had to sneakily add a module declaration to the top of a source file when I wrote
http://www.haskell.org/haskellwiki/Learn_Haskell_in_10_minutes#Function_defi...
-- Chris Smith